At least two (2) of Aristotle's works specifically concern morality, the Eudemian Ethics and the Nicomachean
Ethics.
Self-realizationism
Aristotle's ethical system where someone acts in line with their nature or end ('telos') and thus realizes their full potential, they do moral and will be happy
Three general descriptions, which are interrelated, can be used to depict Aristotle's ethics
First, his ethical system may be termed "self-realizationism"
In his philosophy, when someone acts in line with his nature or end ('telos') and thus realizes his full potential, he does moral and will be happy
Eudaimonistic
Focuses on happiness (eudaimonia), or the good for man, and how to obtain it
Aretoic
Virtue-based moral philosophy, interested in what we should be, the character or the sort of person we should struggle to become
Telos
An end or purpose
Aristotle believed that the essence or essential nature of beings, including humans, lay not at their cause (or beginning) but at their end ("telos")
Self-realization
The ultimate human goal, achieved by functioning or living consistently with human nature
Achieving self-realization
Produces happiness
Inability to realize self-realization
Leads to sadness, frustration, and ultimately to poor life
Eudaimonia
Happiness, the human good
Virtue
Moral and intellectual excellences, attained through habitual practice
Acting in line with virtues is acting in accordance with reason
The function of human being consists in activities which manifest the best states of his rational aspect, that is the virtues
But since only a few have studied the former, the NicomacheanEthics has been regarded as the Ethics of Aristotle since the beginning of the Christianera.